Under armour long sleeve t shirt junior boys this under armour long sleeve t shirt makes an ideal base layer thanks to its elasticated fabric and compression fit it has a crew neck long sleeves and flatlock seams to reduce irritation the top also features heatgear technology which draws sweat away from the body to keep you cool and dry upf 30 protection from the suns uv rays and anti odour technology which prevents the growth of odour causing microbes finished off with the under armour